Default Wallpaper Change K2000

I'm newer to K2000, but we've been asked to add in a wallpaper change to our deployment process. Obviously we could just do it manually after setting up AD for the first time, but I want to work towards streaming everything into one automated process.

This is what I've got thus far, and for some reason it's not working. Stating it isn't able to find the file listed, but everything looks right.